Features: ART RULING PEN. These art ruling pens are traditionally designed drawing tools that lay down line in paint, gouache or any fluid medium with the viscosity to flow. ADJUSTABLE, . Just select the width with screw adjuster. By adjusting the screw on the side, you can carefully and very accurately adjust the width of the finelines you are creating. Used to draw line of precise thickness with gouache paint. CREATE ACCURATE FINE LINE. Especially designed for fine line drawing, cartography, calligraphy, technical drawings. Use with Indian inks, gouache, drawing inks, watercolor, and masking fluids. WIDE APPLICATION. Perfect for creating precise-line, art illustration gouache painting, watercolor painting, oil painting, etc. Adjust to your chosen line width, dip the ruling pen in inks or masking fluid and draw onto the paper. EASY TO USE. If you use masking fluid, let it dry and paint your picture. Once your paintings are dry, remove the masking fluid to reveal the unpainted areas. Quality stainless steel pen tip, excellent strength, and durability. Specifications: Type: H117; H118; H119 H117 Size: Approx. 12.3cm/4.84in H118 Size: Approx. 12.6cm/4.96in H119 Size: Approx. 13cm/5.12in Material: Plastic; Metal Color: As Picture Shown Weight: Approx. 135g Package Includes: 1 Piece Art Ruling Pen note: 1.Please allow 0-1cm error due to manual measurement. make sure you do not mind before you bid. 2.Due to difference between different monitors, the picture may not reflect the actual color of the item.